Cited by 138Lung Cancer Treatments and MutationsHER2/EGFR in Cancer ResearchLung Cancer Diagnosis and Treatment

Activity of Epidermal Growth Factor Receptor-Tyrosine Kinase Inhibitors in Patients with Non-small Cell Lung Cancer Harboring Rare Epidermal Growth Factor Receptor Mutations

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De Pas, Tommaso, Toffalorio, Francesca, Manzotti, Michela, Fumagalli, Caterina, Spitaleri, Gianluca, Catania, Chiara, Delmonte, Angelo, Giovannini, Monica +3 more·2011·Journal of Thoracic Oncology

Abstract

Introduction Mutations of the epidermal growth factor receptor (EGFR) have been proven to predict activity of the EGFR-tyrosine kinase inhibitors (EGFR-TKI), gefitinib and erlotinib. Although the "common" EGFR mutations, such as the L858R point mutation in exon 21 and the in-frame deletional mutation in exon 19, have been definitively associated with response to EGFR-TKIs, the correlation with response to treatment for many other rarer mutations is still unclear. In this study, we report the results of treating patients with advanced non-small cell lung cancer harboring rare EGFR mutations treated with EGFR-TKIs.Methods The frequency of rare mutations has been investigated in 681 cases of non-small cell lung cancer screened between 2006 and 2010. Mutations in exons 18 and 20, uncommon mutations in exons 19 and 21, and/or the presence of different mutations in a single tumor (complex mutations) were considered rare.Results EGFR mutations were detected in 99 tumors (14.5%). Eighteen cases carried rare mutations, and 10 of these patients were treated with erlotinib or gefitinib. The clinical outcome was described case by case with references to the literature. Of note, we found two EGFR mutations never identified before and one of unknown response to EGFR-TKIs.Conclusions Gefitinib and erlotinib have different antitumor activity according to the type of the EGFR mutation borne. Report of cases harboring rare mutations can support the decision-making process in this subset of patients.

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  1. Marchetti A, Felicioni L, Buttitta F. Assessing EGFR mutations. N Engl J Med 2006;354:526 -528.

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Authors
De Pas, T., Toffalorio, F., Manzotti, M., Fumagalli, C., Spitaleri, G., Catania, C., Delmonte, A., Giovannini, M., Spaggiari, L., de Braud, F., & Barberis, M.
Affiliations
  • European Institute of Oncology (IT)
  • University of Milan (IT)
Venue
Journal of Thoracic Oncology
Publisher
Elsevier BV
Published
2011-11
Volume
6
Issue
11
Pages
1895-1901
ISSN
1556-0864 (ISSN-L)
OpenAlex
W2005728761
Cited by
138
References
32
Citations by year
2026: 1 · 2025: 5 · 2024: 5 · 2023: 7 · 2022: 8 · 2021: 12 · 2020: 12 · 2019: 11 · 2018: 5 · 2017: 15 · 2016: 9 · 2015: 10 · 2014: 13 · 2013: 13 · 2012: 11
FWCI
10.34
Type
journal article
Language
en
Open access
Locations
  • Journal of Thoracic Oncology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Lung Cancer Treatments and Mutations
  • Health Sciences › Medicine › Oncology › HER2/EGFR in Cancer Research
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Lung Cancer Diagnosis and Treatment
Keywords
epidermal growth factor receptor, EGFR mutation, uncommon EGFR mutations, EGFR tyrosine kinase inhibitors, gefitinib, erlotinib, non-small cell lung cancer, exon 18 mutations, exon 20 mutations, complex mutations, treatment response, predictive biomarkers
MeSH terms
Erlotinib Hydrochloride, Gefitinib, Adenocarcinoma, Adult, Aged, Aged, 80 and over, Antineoplastic Combined Chemotherapy Protocols, Carcinoma, Non-Small-Cell Lung, Female, Humans, Lung Neoplasms, Male, Middle Aged, Mutation, Neoplasm Staging, Quinazolines, Retrospective Studies, Review Literature as Topic, Treatment Outcome, ErbB Receptors

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